<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="../vue.js"></script>
</head>

<body>
    <div id="app">
        <!-- 点击改变状态 -->
        <button @click="isHot=!isHot">改变天气</button>
        <div>
            <h1>以下是今天的天气预报</h1>
            <!-- v-if接受一个布尔值，根据元素是否渲染出来 -->
            <p v-if="isHot">今天天气真热</p>
            <p v-if="!isHot">今天天气真冷</p>
        </div>

    </div>

    <script>
        Vue.config.prodactionTip = false

        const vm = new Vue({
            el: "#app",
            data() {
                return {
                    isHot: true
                }
            }
        })
    </script>
</body>

</html>